The Collaborative International Dictionary of English v.0.48:

Galactopoietic \Ga*lac`to*poi*et"ic\, a. [Gr. ?, ?, milk + ?
   capable of making; fr. ? to make.] (Med.)
   Increasing the flow of milk; milk-producing. -- n. A
   galactopoietic substance.
   [1913 Webster]